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54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
/*
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* COPYRIGHT: GPL - See COPYING in the top level directory
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* PROJECT: ReactOS Virtual DOS Machine
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* FILE: subsystems/mvdm/ntvdm/cpu/bop.c
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* PURPOSE: BIOS Operation Handlers
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* PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
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* Hermes Belusca-Maito (hermes.belusca@sfr.fr)
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*/
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/* INCLUDES *******************************************************************/
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#include "ntvdm.h"
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#define NDEBUG
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#include <debug.h>
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#include "emulator.h"
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#include "bop.h"
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/* PRIVATE VARIABLES **********************************************************/
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/*
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* This is the list of registered BOP handlers.
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*/
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static EMULATOR_BOP_PROC BopProc[EMULATOR_MAX_BOP_NUM] = { NULL };
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/* PUBLIC FUNCTIONS ***********************************************************/
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VOID RegisterBop(BYTE BopCode, EMULATOR_BOP_PROC BopHandler)
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{
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BopProc[BopCode] = BopHandler;
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}
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VOID FASTCALL EmulatorBiosOperation(PFAST486_STATE State, UCHAR BopCode)
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{
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WORD StackSegment, StackPointer;
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LPWORD Stack;
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/* Get the SS:SP */
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StackSegment = State->SegmentRegs[FAST486_REG_SS].Selector;
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StackPointer = State->GeneralRegs[FAST486_REG_ESP].LowWord;
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/* Get the stack */
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Stack = (LPWORD)SEG_OFF_TO_PTR(StackSegment, StackPointer);
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/* Call the BOP handler */
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if (BopProc[BopCode] != NULL)
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BopProc[BopCode](Stack);
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else
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DPRINT1("Invalid BOP code: 0x%02X\n", BopCode);
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}
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/* EOF */
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